Studies On The Regeneration And Succession Process Of Korean Pin EForest

According to the life-cycle Process of Korean Pines from migration, regeneration to forest ma-turity, this thesis, based on the nutritional dynamics, combines the macrscopic with microsco-Pic, the qualitatiive with quantitative and the observational with experimental methods to study the whole Process in regeneration and succession of Korean Pines Forest .1, The nutrient concentration in the wood rings of Korean Pines shows a Period changes about 357years. And the seeding and rodent number in the forest also have some 3 to 5 years Period of changes .2 * Seed ? squirrel and seedlings are the key ooaPonets for ths regenration , tiia Period Seeding imProveS squirrels and sjiijsquentiy other carnivors numi) ar to increase, and finaly brings about formations of the complicated stable food webs in the Korean Pine Forest ?3 * There are quite a large number of Korean Pins seedlings in the virgen forest ?, But, they are siow in growth, high in death rate and fewef of them can reach to the saPling stage ? Low light intensity is most important factor to influence growth and survival . For the different season's shadding, its affecting order is all .ear round shadding>nongrowing season sha-dding> growing season shadding > controlled seedlings.4 > Comparing with the monolayer forest , the multilayer forest characterized by low reflective rate, high abSorPion of sunlight and large amount caPtUre of radiation energy in unit time and unit area , fast growth rate , high Productivity and high sun-energy using effeciency ?5 ?? There exists strict ProPortional relation-' between leaf area and Productivity ? Even diffe rent stands f their leaf area and Productivity ofeach species also have some ProPortional relations ? Beside this , trees win grow ProPortion-al with their stem size and each organ's bioni-ass win keep a constant ProPortion ? tut the inferior trees show their organ biomass increase or decrease exponentially ?6 ■? In the mixed forest by coniferous and b-roadieaved trees f the highest nutrient absorPt-ion time of broadiead trees win be one or two month latter than that of Korean Pines . The m-uitiiayer forest can accumulate much nutrient than that the monolayer one .7 ?Korean Pine saedings are agreed to nomal distribution and trees towards Poisson distribution in the virgon f or?st ? The former Presents a kind of contagious f the latter more uniform ones . The age structure of Korean Pine-ToPuiation Shows a normal distribution and it keep change from junior to senior, however i the PrinciPal styucture model win not change in the dynamic Process ?8 ?? The over biomass accumulation of korsan Pine relates to.the Period succession between ooniferons and broadieaved trees and the generation replacement' among the Korean Pine PoPui-ation itsief . The high, ability in tolerance , b-ig boimass and long life—sPan are iaPotaut elements to maintain. Korean Pines dominant and occuPy a regional climax in the natural forest ■ 9 * The maximum Production at unit time and unit atea is the PrinciPie in the management and development of korean Pine forest ? We should combine the siivieuture of different sized trees and PaPer—used trees , the long—term Plane and Present day economic effects t and the way of Planting conifers both under brOadieaved canoPy and coniferous canoPy to deveioP korean Pine Porest . And the total mountain area should take the road of commodation. # citation and industrialization ?...